The ISA allowance for the 2020/21 tax year is $20,000. This means you can save $20,000 of new money into your ISA in this tax year. Our Cash ISA maximum balance is $250,000 so you can transfer other ISA balances into your new Republic Trust Bank ISA up to $250,000. If these balances are from previous tax years, they do not count towards the $20,000 limit in the current tax year 2020/2021.